Key regeneration-free ciphertext-policy attribute-based encryption and its application

Attribute-based encryption (ABE) provides a promising solution for enabling scalable access control over encrypted data stored in the untrusted servers (e.g., cloud) due to its ability to perform data encryption and decryption defined over descriptive attributes. In order to bind different component...

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Main Authors: CUI, Hui, DENG, Robert H., QIN, Baodong, WENG, Jian
Format: text
Language:English
Published: Institutional Knowledge at Singapore Management University 2020
Subjects:
ABE
Online Access:https://ink.library.smu.edu.sg/sis_research/5061
https://ink.library.smu.edu.sg/context/sis_research/article/6064/viewcontent/Key_regeneration_av.pdf
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Institution: Singapore Management University
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spelling sg-smu-ink.sis_research-60642020-03-12T07:55:33Z Key regeneration-free ciphertext-policy attribute-based encryption and its application CUI, Hui DENG, Robert H. QIN, Baodong WENG, Jian Attribute-based encryption (ABE) provides a promising solution for enabling scalable access control over encrypted data stored in the untrusted servers (e.g., cloud) due to its ability to perform data encryption and decryption defined over descriptive attributes. In order to bind different components which correspond to different attributes in a user's attribute-based decryption key together, key randomization technique has been applied in most existing ABE schemes. This randomization method, however, also empowers a user the capability of regenerating a newly randomized decryption key over a subset of the attributes associated with the original decryption key. Because key randomization breaks the linkage between this newly generated key and the original key, a malicious user could leak the new decryption key to others without taking any responsibility for the key abuse. To solve this problem, we think of key regeneration-free ABE to disallow a user from randomizing his/her decryption key in any manner, i.e., a user can only delegate his/her decryption key in exactly the same form without any modification so that any abused or pirated key can be traced back to its original owner. Motivated by strongly unforgeable signature, we first define a security notion called strong key unforgeability, and show that ABE schemes equipped with the strong key unforgeability are immune to key regeneration. We then provide a generic transformation to convert ciphertext-policy ABE (CP-ABE) schemes of certain type to key regeneration-free CP-ABE schemes, and show how the transformation works by presenting two concrete constructions. 2020-01-05T08:00:00Z text application/pdf https://ink.library.smu.edu.sg/sis_research/5061 info:doi/10.1016/j.ins.2019.12.025 https://ink.library.smu.edu.sg/context/sis_research/article/6064/viewcontent/Key_regeneration_av.pdf http://creativecommons.org/licenses/by-nc-nd/4.0/ Research Collection School Of Computing and Information Systems eng Institutional Knowledge at Singapore Management University ABE Generic transformation Key randomization Key regeneration-free Information Security Medicine and Health Sciences
institution Singapore Management University
building SMU Libraries
continent Asia
country Singapore
Singapore
content_provider SMU Libraries
collection InK@SMU
language English
topic ABE
Generic transformation
Key randomization
Key regeneration-free
Information Security
Medicine and Health Sciences
spellingShingle ABE
Generic transformation
Key randomization
Key regeneration-free
Information Security
Medicine and Health Sciences
CUI, Hui
DENG, Robert H.
QIN, Baodong
WENG, Jian
Key regeneration-free ciphertext-policy attribute-based encryption and its application
description Attribute-based encryption (ABE) provides a promising solution for enabling scalable access control over encrypted data stored in the untrusted servers (e.g., cloud) due to its ability to perform data encryption and decryption defined over descriptive attributes. In order to bind different components which correspond to different attributes in a user's attribute-based decryption key together, key randomization technique has been applied in most existing ABE schemes. This randomization method, however, also empowers a user the capability of regenerating a newly randomized decryption key over a subset of the attributes associated with the original decryption key. Because key randomization breaks the linkage between this newly generated key and the original key, a malicious user could leak the new decryption key to others without taking any responsibility for the key abuse. To solve this problem, we think of key regeneration-free ABE to disallow a user from randomizing his/her decryption key in any manner, i.e., a user can only delegate his/her decryption key in exactly the same form without any modification so that any abused or pirated key can be traced back to its original owner. Motivated by strongly unforgeable signature, we first define a security notion called strong key unforgeability, and show that ABE schemes equipped with the strong key unforgeability are immune to key regeneration. We then provide a generic transformation to convert ciphertext-policy ABE (CP-ABE) schemes of certain type to key regeneration-free CP-ABE schemes, and show how the transformation works by presenting two concrete constructions.
format text
author CUI, Hui
DENG, Robert H.
QIN, Baodong
WENG, Jian
author_facet CUI, Hui
DENG, Robert H.
QIN, Baodong
WENG, Jian
author_sort CUI, Hui
title Key regeneration-free ciphertext-policy attribute-based encryption and its application
title_short Key regeneration-free ciphertext-policy attribute-based encryption and its application
title_full Key regeneration-free ciphertext-policy attribute-based encryption and its application
title_fullStr Key regeneration-free ciphertext-policy attribute-based encryption and its application
title_full_unstemmed Key regeneration-free ciphertext-policy attribute-based encryption and its application
title_sort key regeneration-free ciphertext-policy attribute-based encryption and its application
publisher Institutional Knowledge at Singapore Management University
publishDate 2020
url https://ink.library.smu.edu.sg/sis_research/5061
https://ink.library.smu.edu.sg/context/sis_research/article/6064/viewcontent/Key_regeneration_av.pdf
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